Container form for expansion joints



1929- A. c. FISCHER CONTAINER FORM FOR EXPANSION JOINTS Filed Nov. 19,1925 Patented Oct.- 15, 1929 UNITED STATES PATENT QFFI CE ALBERT C.FISCHER, OF CHICAGO, ILLINOIS, ASSIGINOB TO THE PHILIP CAREY MANU-FACTURING COMPANY, A CORPORATION OF OHIO CONTAINER FORM FOR EXPANSIONJOINTS Original application filed June 19, 1922, Serial No. 569,247.Divided and this application filed November This is a division of myapplication Serial No. 569,247-Container form for expansion joint andmethod of installing same, filed June 19, 1922, and particularly refersto the s envelope as such constructed from nonmetallic fabricated sheetmaterial, having a suitable coating which readily binds with theconcrete surface upon the application of heat.

Figure 1 is a perspective view of a portion of the folded non-metallicsheet material from which I construct one form of the container.

Figure 2 is a similar view showing the extended crowning edges.

Figure 3 is a similar view showing a modi fied form of the base portion,the same being collapsed.

Fi re 4 is a similar view showing the base portion folded longitudinallybut not com- 29 pletely collapsed.

Figure 5 is a similar view showing still another form of base portion.It may be readily understood that a low melting point material wouldreadily unite with the concrete in the temperature of the sun upon theconcrete surface in summer weather, or by the use of a high meltingpoint material would be dependent upon the filler and the heat impartedfrom the inside of the envelope from the filler for adhesion to theconcrete face.

It has been ithe early practice in providing expansion joints to place astrip of wood at the intersection in the roadway, where it is desired toprovide for the expansion and contraction of the concrete, and laterremove the strip and pour heated bituminous matter in the crevice.

This method was superseded by premoulded oints installed at the time ofpouring the concrete. However, it has since been found that joints withfelt sides and others having interfering substances on the sides do notadhere to the walls of the concrete and consequently do not keep thecrevice waterproof.

It is also customary to allow the joint to protrude one half to one inchabove the 59 finished surface, so that the traffic will work Serial No.70,077.

this edge over the edges of the concrete on either side of the joint.

When pouring the joint heretofore a V has been formed by the heatedmaterial in settling, and this necessitates goin over the creviceseveral times with heated material, until filled. But then no surpluswas provided, as in the case where half to one inch was allowed toproject, when a premoulded joint is used.

My improvement performs two important functions, it provides a means tocompel adhesion to the side walls of the concrete, and also it providesa means for forming a protruding edge to take the Wear of the traflicand protect the edges of the concrete. It also prevents tearing awayconcrete when pulling the spacing board, which frequently happens inremoving the wooden strips.

I furnish a container form in the shape of a covering which will fit thespacin board and protrude above the surface of t e concrete. Thisenvelope is made of saturated felt preferably, but may be made of anysuitable non-metallic fabricated sheet material, such as, paper, cloth,burlap, canvas, or other substances. The outside is preferably coatedwith a fair coating of bitmuminous or other suitable adhesive.

The envelope is placed about the spacing or backing board and staked inposition. The concrete is poured and allowed to set. The envelope has aflanged base over which the concrete is placed and which sets as aholding means in preventing the container form raising upon pulling outthe hacking or spacing board. When the board is removed the containerremains in place and is filled with suitable filler. These fillers areusually heated to 300 or 400 degrees, and this temperature willnaturally compel adhesion by melting the material on the outside of thecontainer or the material with which the container is saturated.

Steel container forms are objectionable for the reason that they mustprovide anchoring means in the concrete to hold them in place, becausethe concrete will not adhere to the metal sides, with the result thatrust soon sets in and the rusted parts act as an inter- 100 fering meansbetween the asphalt and the slabs. Likewise metal is not shock proof, asis a piece of felt, and the result is that the continuous shock-of thetraffic imparts impact to the metal and breaks the asphalt masscontained therein into particles in the winter cold, so that when theearly spring rains occur the asphalt is washed out in lumps and adefective joint is made.

This does not occur where the felt sides are used, which take up theshock and protect the mass enclosed therein. Likewise the mastic on thesides of the felt cause adhesion to the cement surfaces, whereasthemetal container does not have this advantage; This container may also befilled away from the work and inserted as a preformed joint, havingadhesive material on its sides, in which case the adhesive materialwould be of a lower melting point.

Referring now to the drawing in detail C represents the non-metallicfabricated sheet folded to provide the spaced side walls with a baseportion yoking the same together and cooperating therewith to develop acontainer form. As shown in Figure 2 the crowning edgesof the side wallsare adapted to be folded inwardly to project above the surface of theconcrete in which'the form'is installed, so as to enable the pouredfiller to also project and be mushroomed down by tratfic', so as tocover the edges of the concrete slabs between which the joint isinstalled. The folds in the crowning edge have no particularsignificance since the same result is accomplished by making the sidewalls tall enough so as to accomplish this purpose.

To utilize the device in an ordinary spacing strip as previouslyreferred to, it is inserted in the form and the form together with thespacing strip is then set up in position so that the concrete is pouredaround the assembly, and after the concrete has set to a predeterminedextent the spacing strip is removed and the filler poured into thecontainer form.

As shown in Figure 3 the base portion may be made with projectingflanges d-d disposed transversely of the side walls so as to interlockthe concrete slabs between which the joints are installed, in fact theywould be imbedded under the concrete. Such a structure would prevent thejoint filler and envelope from raising out of the joint.

It so happens that in Figure 3 the projecting flanges are showncollapsed, so as not to take too much room in shipping. The flanges maybe collapsed by providing longitudinal flanges on the base portionnearest the side walls C. so that the flanges may assume substantialalignment with the vertical plane of the side walls.

The same form of the invention is illustrated in Figure 4, only the baseportion is not as completely collapsed as in Figure 3.

In Figure 5 the base portion is made with squared flanged pro ectionsald. In this.

form the collapsible feature of the base portion can be accomplished aswell as with the form shown in Figures 3 and 4, and at the same time itdevelops an exceptional structure.

-It may readily be understood that many modifications may be made inthis invention. The oint may be installed in reservoirs, walls,sidewalks and buildings, or used for other construction purposes. I

The filler may either be solid or compressible or cellular, as desired.Likewise the spacing strip need not be necessarily have a cap strip, andthe spacing strip may be .made of any suitable material that Will yieldto the traffic in reducing the protruding part of the 'oint. Y J Thecontainer or envelope fitting over the spacing strip and later becomingthe mould in the concrete, need not necessarily be restricted tostraight protruding edges. but the edges may be slightly curved in, asshown in Figure 3, now Figure 2, and may be held in place by the capstrip b old Figure 1. The container may be used for any filling materialadapted for expansion or marking purposes.

I claim:

1. A container form for poured expansion joints, comprising anon-metallic fabricated joints. comprising a 'norrmtallic fabricatedsheet folded upon itself to provide side walls, and a base portionyoking together said side walls, and a longitudinal fold in the baseportion intermediate the side walls, permitting the base portion to'collapse with the projecting flanges thereof and to move into a planesubstantiallv in alignment with the-side walls, said sheet being ofconsiderable thickness whereby said container will remain in open erectposition to receive poured filler and said sheet carrying a coating witha low melting point material which will readily unite with concrete inthe temperature the concrete surface in the summer weather.

3. A non-metallic container having walls of considerable thickness andrigidity adapted to have a hituminuous filler poured thereinto wherebysaid container and filler will act as expansible and contractibleconstructional material, said filler having its sides coated with. a lowmelting point material which will readily unite with concrete in thetemperaof the sun upon ture of the sun upon the concrete surface in thesummerweather. A. Constructional material comprising a water-'proofedfibrous envelope adapted to re' 5 ceive water proofed filling material,said envelope having integral sides and a bottom and being open at thetop, said envelope carrying a coat-ing of low melting point materialadapted readily to unite with concrete in the tem- 10 perature of thesun upon the concrete surface in the summer weather and said envelopebeing of suflioient thickness and rigidity to maintain itself in openform when open for filling. I

15 5. A container adapted to receive water proofed filler whereby toform expansible and contractible constructional material, said containercomprising an envelope of non-metallic sheet material saturated withWater 9 proofing material and carrying an exterior coating of a lowmelting point adhesive material that will readil unite with concrete inthe temperature of t 1e sun upon the concrete surface in the summerweather.

25 Signed at Chicago, 111., this 17 day of November, 1925.

, ALBERT C. FISCHER

